Al<sub>2</sub>O<sub>3</sub>弥散强化Cu基复合材料高温拉伸行为研究

韩胜利; 田保红; 宋克兴; 刘平; 董企铭; 刘勇; 曹先杰; 牛立业

doi:10.19515/j.cnki.1003-1545.2004.03.002

Al₂O₃弥散强化Cu基复合材料高温拉伸行为研究

1. 河南科技大学, 河南洛阳 471003;
2. 洛阳铜加工集团有限责任公司, 河南洛阳 471003

基金项目:

河南省重大科技攻关项目(0122021300)；河南科技大学基金项目(2002QN03)资助。

详细信息

作者简介:
韩胜利,男,1978年生,河南项城市人,硕士生

中图分类号: TG113.25⁺3
计量
- 文章访问数: 26
- HTML全文浏览量: 12
- PDF下载量: 2
出版历程
- 收稿日期: 2003-11-03
- 网络出版日期: 2024-04-28

Tensile Behavior of Al₂O₃ Dispersive Strengthened Copper-based Composite at Elevated Temperature

1. Henan University of S & T, Luoyang 471003, China;
2. Luoyang Copper Work Group Ltd., Luoyang 471003, China

摘要

摘要: Al₂O₃颗粒弥散强化铜基复合材料因具有高强度和高导电性而在电子行业和电阻焊行业有着广阔的应用前景,本文利用扫描电子显微镜和透射电子显微镜对内氧化法制备的Al₂O₃/Cu复合材料的显微组织进行了分析,并用高温电子拉伸试验机测试了其高温拉伸力学性能。结果表明,Cu 0.6%Al₂O₃复合材料的室温拉伸屈服强度为442MPa,600℃时屈服强度为154MPa;试验温度低于300℃,其断面收缩率为22.2%~62.0%,温度高于400℃,其断面收缩率为4.5%~9.1%,呈现出明显的高温脆性。对其拉伸断口形貌和断裂机理进行了初步分析。
- Al₂O₃/Cu复合材料 /
- 内氧化 /
- 拉伸行为 /
- 高温脆性
Abstract: The Al₂O₃ particulates reinforced copper-based composites with high strength and high conductivity at ambient temperature have great potential applications in electrical industry and resistance welding industry. A novel Al₂O₃ particulates reinforced copper-based composite is fabricated by means of internal oxidation method. The microstructure of the composite is investigated under transmission electron microscope (TEM) and scanning electron microscope (SEM). The tensile strength and plasticity of the composite are determined at the temperature range of 25~1000℃.Resultsshow that the Al₂O₃/Cu composite presents excellent high yield strength and high fracture strength at elevated temperature. The yield strength reaches 154MPa at 600℃.Brittle fracture occurs at elevated temperature with contrast to the ductile fracture at ambient temperature. The brittle fracture mechanism is discussed in brief.
- Al₂O₃/Cu Composite /
- Internal oxidation /
- Tensile behavior /
- Brittleness at elevated temperature